Coltellaro J, LeGare M, Terdiman J
California State University, Sacramento, USA.
Percept Mot Skills. 1995 Apr;80(2):355-69. doi: 10.2466/pms.1995.80.2.355.
Monocular pursuit and saccadic eye movements were compared between a group of 5 men with cerebral palsy and a group of 5 men with normal movements using an infrared corneal reflection technique. Triangle, sine, and square waves (in the time domain) at 0.3 Hz in the horizontal and vertical dimensions were used as the stimuli for six 10-sec. tests of each subject. The momentary difference between stimulus and eye positions was used to obtain values for five pursuit variables (triangle and sine wave tests) Land five saccadic variables (square wave tests). The t tests for differences between these means showed that the cerebral palsy group had more fixations during the four pursuit tests, more saccadic intrusions during the horizontal pursuit tests, a greater maximum pursuit error during the horizontal sine wave test, and a greater maximum fixation error during the horizontal square wave test. The group means were not different for pursuit gain and saccadic velocity and latency. The dynamics of the errors during the tests of pursuit movements indicate that cerebral palsied persons may be unable to maintain the constant velocity of eye movement required to track a triangle wave stimulus. The dynamics of the errors during the tests of saccadic movements indicate that cerebral palsied persons would be unable to use technological devices for assisting communication, which depend on visual fixation as a control signal.
使用红外角膜反射技术，对一组5名患有脑瘫的男性和一组5名运动正常的男性的单眼追踪和眼球跳动进行了比较。在水平和垂直方向上，以0.3赫兹的三角波、正弦波和方波（在时域中）作为刺激，对每个受试者进行6次10秒的测试。刺激与眼睛位置之间的瞬间差异用于获得五个追踪变量（三角波和正弦波测试）和五个眼球跳动变量（方波测试）的值。对这些平均值之间差异的t检验表明，脑瘫组在四项追踪测试中注视更多，在水平追踪测试中眼球跳动侵入更多，在水平正弦波测试中最大追踪误差更大，在水平方波测试中最大注视误差更大。两组在追踪增益、眼球跳动速度和潜伏期方面的平均值没有差异。追踪运动测试期间误差的动态变化表明，脑瘫患者可能无法维持跟踪三角波刺激所需的眼球运动恒定速度。眼球跳动运动测试期间误差的动态变化表明，脑瘫患者将无法使用依赖视觉注视作为控制信号的辅助通信技术设备。
